Template pages issue

Tested this code:

<?php
// let’s generate info appropriate to the page being displayed
if (is_home()) {
// we’re on the home page, so let’s show a list of all top-level categories
echo “home”;
} elseif (is_category(‘Beauty & Health’)) {
// we’re looking at a single category view, so let’s show _all_ the categories
echo “beauty-health”;
} elseif (is_single()) {
echo “single”;
} elseif (is_page()) {
// we’re looking at a static page. Which one?
if (is_page(‘Archives’)) {
// our about page.
echo “<p>This is my about page!</p>”;
} elseif (is_page(‘Colophon’)) {
echo “<p>This is my colophon page, running on WordPress ” . bloginfo(‘version’) . “</p>”;
} else {
// catch-all for other pages
echo “check”;
}
} else {
// catch-all for everything else (archives, searches, 404s, etc)
echo “Error”;
} // That’s all, folks!
?>

AND when i try is_category(‘Beauty & Health’) it doesn’t work but with in_category(‘4’) it works fab. Why?